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<h1 id="ecs-centos7">以阿里 ECS CentOS7 为例磁盘在线扩容<a class="headerlink" href="#ecs-centos7" title="Permanent link">&para;</a></h1>
<p><a href="https://help.aliyun.com/document_detail/113316.html?spm=5176.11346930configuration.help.dexternal.37125ca3e9okwu#concept-syg-jxz-2hb">参考 1: ECS linux 在线扩容</a></p>
<blockquote>
<p>注; 请阅读文档，会有一些限制，如: kernel &gt;= 3.6.0</p>
</blockquote>
<ul>
<li>操作过程</li>
</ul>
<div class="highlight"><pre><span></span><code><a id="__codelineno-0-1" name="__codelineno-0-1"></a><a href="#__codelineno-0-1"><span class="linenos" data-linenos=" 1 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1"># lsblk</span>
<a id="__codelineno-0-2" name="__codelineno-0-2"></a><a href="#__codelineno-0-2"><span class="linenos" data-linenos=" 2 "></span></a>NAME   ALIGNMENT MIN-IO OPT-IO PHY-SEC LOG-SEC ROTA SCHED       RQ-SIZE   RA WSAME
<a id="__codelineno-0-3" name="__codelineno-0-3"></a><a href="#__codelineno-0-3"><span class="linenos" data-linenos=" 3 "></span></a>vda            <span class="m">0</span>    <span class="m">512</span>      <span class="m">0</span>     <span class="m">512</span>     <span class="m">512</span>    <span class="m">1</span> mq-deadline     <span class="m">256</span> <span class="m">4096</span>    0B
<a id="__codelineno-0-4" name="__codelineno-0-4"></a><a href="#__codelineno-0-4"><span class="linenos" data-linenos=" 4 "></span></a>└─vda1         <span class="m">0</span>    <span class="m">512</span>      <span class="m">0</span>     <span class="m">512</span>     <span class="m">512</span>    <span class="m">1</span> mq-deadline     <span class="m">256</span> <span class="m">4096</span>    0B
<a id="__codelineno-0-5" name="__codelineno-0-5"></a><a href="#__codelineno-0-5"><span class="linenos" data-linenos=" 5 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1">#</span>
<a id="__codelineno-0-6" name="__codelineno-0-6"></a><a href="#__codelineno-0-6"><span class="linenos" data-linenos=" 6 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1">#</span>
<a id="__codelineno-0-7" name="__codelineno-0-7"></a><a href="#__codelineno-0-7"><span class="linenos" data-linenos=" 7 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1"># fdisk -lu</span>
<a id="__codelineno-0-8" name="__codelineno-0-8"></a><a href="#__codelineno-0-8"><span class="linenos" data-linenos=" 8 "></span></a>Disk /dev/vda: <span class="m">80</span> GiB, <span class="m">85899345920</span> bytes, <span class="m">167772160</span> sectors
<a id="__codelineno-0-9" name="__codelineno-0-9"></a><a href="#__codelineno-0-9"><span class="linenos" data-linenos=" 9 "></span></a>Units: sectors of <span class="m">1</span> * <span class="nv">512</span> <span class="o">=</span> <span class="m">512</span> bytes
<a id="__codelineno-0-10" name="__codelineno-0-10"></a><a href="#__codelineno-0-10"><span class="linenos" data-linenos="10 "></span></a>Sector size <span class="o">(</span>logical/physical<span class="o">)</span>: <span class="m">512</span> bytes / <span class="m">512</span> bytes
<a id="__codelineno-0-11" name="__codelineno-0-11"></a><a href="#__codelineno-0-11"><span class="linenos" data-linenos="11 "></span></a>I/O size <span class="o">(</span>minimum/optimal<span class="o">)</span>: <span class="m">512</span> bytes / <span class="m">512</span> bytes
<a id="__codelineno-0-12" name="__codelineno-0-12"></a><a href="#__codelineno-0-12"><span class="linenos" data-linenos="12 "></span></a>Disklabel type: dos
<a id="__codelineno-0-13" name="__codelineno-0-13"></a><a href="#__codelineno-0-13"><span class="linenos" data-linenos="13 "></span></a>Disk identifier: 0x319ba3a3
<a id="__codelineno-0-14" name="__codelineno-0-14"></a><a href="#__codelineno-0-14"><span class="linenos" data-linenos="14 "></span></a>
<a id="__codelineno-0-15" name="__codelineno-0-15"></a><a href="#__codelineno-0-15"><span class="linenos" data-linenos="15 "></span></a>Device     Boot Start       End   Sectors Size Id Type
<a id="__codelineno-0-16" name="__codelineno-0-16"></a><a href="#__codelineno-0-16"><span class="linenos" data-linenos="16 "></span></a>/dev/vda1  *     <span class="m">2048</span> <span class="m">125829086</span> <span class="m">125827039</span>  60G <span class="m">83</span> Linux
<a id="__codelineno-0-17" name="__codelineno-0-17"></a><a href="#__codelineno-0-17"><span class="linenos" data-linenos="17 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1">#</span>
<a id="__codelineno-0-18" name="__codelineno-0-18"></a><a href="#__codelineno-0-18"><span class="linenos" data-linenos="18 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1">#</span>
<a id="__codelineno-0-19" name="__codelineno-0-19"></a><a href="#__codelineno-0-19"><span class="linenos" data-linenos="19 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1"># df -Th</span>
<a id="__codelineno-0-20" name="__codelineno-0-20"></a><a href="#__codelineno-0-20"><span class="linenos" data-linenos="20 "></span></a>Filesystem     Type      Size  Used Avail Use% Mounted on
<a id="__codelineno-0-21" name="__codelineno-0-21"></a><a href="#__codelineno-0-21"><span class="linenos" data-linenos="21 "></span></a>devtmpfs       devtmpfs  <span class="m">1</span>.8G     <span class="m">0</span>  <span class="m">1</span>.8G   <span class="m">0</span>% /dev
<a id="__codelineno-0-22" name="__codelineno-0-22"></a><a href="#__codelineno-0-22"><span class="linenos" data-linenos="22 "></span></a>tmpfs          tmpfs     <span class="m">1</span>.8G     <span class="m">0</span>  <span class="m">1</span>.8G   <span class="m">0</span>% /dev/shm
<a id="__codelineno-0-23" name="__codelineno-0-23"></a><a href="#__codelineno-0-23"><span class="linenos" data-linenos="23 "></span></a>tmpfs          tmpfs     <span class="m">1</span>.8G  620K  <span class="m">1</span>.8G   <span class="m">1</span>% /run
<a id="__codelineno-0-24" name="__codelineno-0-24"></a><a href="#__codelineno-0-24"><span class="linenos" data-linenos="24 "></span></a>tmpfs          tmpfs     <span class="m">1</span>.8G     <span class="m">0</span>  <span class="m">1</span>.8G   <span class="m">0</span>% /sys/fs/cgroup
<a id="__codelineno-0-25" name="__codelineno-0-25"></a><a href="#__codelineno-0-25"><span class="linenos" data-linenos="25 "></span></a>/dev/vda1      xfs        60G   59G  <span class="m">1</span>.2G  <span class="m">99</span>% /
<a id="__codelineno-0-26" name="__codelineno-0-26"></a><a href="#__codelineno-0-26"><span class="linenos" data-linenos="26 "></span></a>tmpfs          tmpfs     360M     <span class="m">0</span>  360M   <span class="m">0</span>% /run/user/0
<a id="__codelineno-0-27" name="__codelineno-0-27"></a><a href="#__codelineno-0-27"><span class="linenos" data-linenos="27 "></span></a>overlay        overlay    60G   59G  <span class="m">1</span>.2G  <span class="m">99</span>% /var/lib/docker/overlay2/67de133d9ad94c69e5748d7b702cc14bc63788687c38d566acd2bdafc7db42c8/merged
<a id="__codelineno-0-28" name="__codelineno-0-28"></a><a href="#__codelineno-0-28"><span class="linenos" data-linenos="28 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1">#</span>
<a id="__codelineno-0-29" name="__codelineno-0-29"></a><a href="#__codelineno-0-29"><span class="linenos" data-linenos="29 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1">#</span>
<a id="__codelineno-0-30" name="__codelineno-0-30"></a><a href="#__codelineno-0-30"><span class="linenos" data-linenos="30 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1">#</span>
<a id="__codelineno-0-31" name="__codelineno-0-31"></a><a href="#__codelineno-0-31"><span class="linenos" data-linenos="31 "></span></a><span class="c1"># see: https://help.aliyun.com/document_detail/113316.html?spm=5176.11346930configuration.help.dexternal.37125ca3e9okwu#concept-syg-jxz-2hb</span>
<a id="__codelineno-0-32" name="__codelineno-0-32"></a><a href="#__codelineno-0-32"><span class="linenos" data-linenos="32 "></span></a><span class="c1"># CentOS7 及以上</span>
<a id="__codelineno-0-33" name="__codelineno-0-33"></a><a href="#__codelineno-0-33"><span class="linenos" data-linenos="33 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1"># yum install -y cloud-utils-growpart</span>
<a id="__codelineno-0-34" name="__codelineno-0-34"></a><a href="#__codelineno-0-34"><span class="linenos" data-linenos="34 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1">#</span>
<a id="__codelineno-0-35" name="__codelineno-0-35"></a><a href="#__codelineno-0-35"><span class="linenos" data-linenos="35 "></span></a><span class="c1"># 如果分区为GPT格式才用此命令</span>
<a id="__codelineno-0-36" name="__codelineno-0-36"></a><a href="#__codelineno-0-36"><span class="linenos" data-linenos="36 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1"># yum install gdisk -y</span>
<a id="__codelineno-0-37" name="__codelineno-0-37"></a><a href="#__codelineno-0-37"><span class="linenos" data-linenos="37 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1">#</span>
<a id="__codelineno-0-38" name="__codelineno-0-38"></a><a href="#__codelineno-0-38"><span class="linenos" data-linenos="38 "></span></a><span class="c1"># 执行扩容分区</span>
<a id="__codelineno-0-39" name="__codelineno-0-39"></a><a href="#__codelineno-0-39"><span class="linenos" data-linenos="39 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1"># growpart /dev/vda 1</span>
<a id="__codelineno-0-40" name="__codelineno-0-40"></a><a href="#__codelineno-0-40"><span class="linenos" data-linenos="40 "></span></a>CHANGED: <span class="nv">partition</span><span class="o">=</span><span class="m">1</span> <span class="nv">start</span><span class="o">=</span><span class="m">2048</span> old: <span class="nv">size</span><span class="o">=</span><span class="m">125827039</span> <span class="nv">end</span><span class="o">=</span><span class="m">125829087</span> new: <span class="nv">size</span><span class="o">=</span><span class="m">167770079</span> <span class="nv">end</span><span class="o">=</span><span class="m">167772127</span>
<a id="__codelineno-0-41" name="__codelineno-0-41"></a><a href="#__codelineno-0-41"><span class="linenos" data-linenos="41 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1">#</span>
<a id="__codelineno-0-42" name="__codelineno-0-42"></a><a href="#__codelineno-0-42"><span class="linenos" data-linenos="42 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1">#</span>
<a id="__codelineno-0-43" name="__codelineno-0-43"></a><a href="#__codelineno-0-43"><span class="linenos" data-linenos="43 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1"># growpart /dev/vda 1</span>
<a id="__codelineno-0-44" name="__codelineno-0-44"></a><a href="#__codelineno-0-44"><span class="linenos" data-linenos="44 "></span></a>NOCHANGE: partition <span class="m">1</span> is size <span class="m">167770079</span>. it cannot be grown
<a id="__codelineno-0-45" name="__codelineno-0-45"></a><a href="#__codelineno-0-45"><span class="linenos" data-linenos="45 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1">#</span>
<a id="__codelineno-0-46" name="__codelineno-0-46"></a><a href="#__codelineno-0-46"><span class="linenos" data-linenos="46 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1">#</span>
<a id="__codelineno-0-47" name="__codelineno-0-47"></a><a href="#__codelineno-0-47"><span class="linenos" data-linenos="47 "></span></a><span class="c1"># 扩容文件系统(如果是 ext4 文件系统才用此命令)</span>
<a id="__codelineno-0-48" name="__codelineno-0-48"></a><a href="#__codelineno-0-48"><span class="linenos" data-linenos="48 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1"># resize2fs /dev/vda1</span>
<a id="__codelineno-0-49" name="__codelineno-0-49"></a><a href="#__codelineno-0-49"><span class="linenos" data-linenos="49 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1">#</span>
<a id="__codelineno-0-50" name="__codelineno-0-50"></a><a href="#__codelineno-0-50"><span class="linenos" data-linenos="50 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1">#</span>
<a id="__codelineno-0-51" name="__codelineno-0-51"></a><a href="#__codelineno-0-51"><span class="linenos" data-linenos="51 "></span></a><span class="c1"># 扩容文件系统(如果是 xfs 文件系统才用此命令)</span>
<a id="__codelineno-0-52" name="__codelineno-0-52"></a><a href="#__codelineno-0-52"><span class="linenos" data-linenos="52 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1"># xfs_growfs /dev/vda1</span>
<a id="__codelineno-0-53" name="__codelineno-0-53"></a><a href="#__codelineno-0-53"><span class="linenos" data-linenos="53 "></span></a>meta-data<span class="o">=</span>/dev/vda1              <span class="nv">isize</span><span class="o">=</span><span class="m">512</span>    <span class="nv">agcount</span><span class="o">=</span><span class="m">13</span>, <span class="nv">agsize</span><span class="o">=</span><span class="m">1310656</span> <span class="nv">blks</span>
<a id="__codelineno-0-54" name="__codelineno-0-54"></a><a href="#__codelineno-0-54"><span class="linenos" data-linenos="54 "></span></a>         <span class="o">=</span>                       <span class="nv">sectsz</span><span class="o">=</span><span class="m">512</span>   <span class="nv">attr</span><span class="o">=</span><span class="m">2</span>, <span class="nv">projid32bit</span><span class="o">=</span><span class="nv">1</span>
<a id="__codelineno-0-55" name="__codelineno-0-55"></a><a href="#__codelineno-0-55"><span class="linenos" data-linenos="55 "></span></a>         <span class="o">=</span>                       <span class="nv">crc</span><span class="o">=</span><span class="m">1</span>        <span class="nv">finobt</span><span class="o">=</span><span class="m">1</span>, <span class="nv">sparse</span><span class="o">=</span><span class="m">1</span>, <span class="nv">rmapbt</span><span class="o">=</span><span class="nv">0</span>
<a id="__codelineno-0-56" name="__codelineno-0-56"></a><a href="#__codelineno-0-56"><span class="linenos" data-linenos="56 "></span></a>         <span class="o">=</span>                       <span class="nv">reflink</span><span class="o">=</span><span class="m">1</span>
<a id="__codelineno-0-57" name="__codelineno-0-57"></a><a href="#__codelineno-0-57"><span class="linenos" data-linenos="57 "></span></a><span class="nv">data</span>     <span class="o">=</span>                       <span class="nv">bsize</span><span class="o">=</span><span class="m">4096</span>   <span class="nv">blocks</span><span class="o">=</span><span class="m">15728379</span>, <span class="nv">imaxpct</span><span class="o">=</span><span class="nv">25</span>
<a id="__codelineno-0-58" name="__codelineno-0-58"></a><a href="#__codelineno-0-58"><span class="linenos" data-linenos="58 "></span></a>         <span class="o">=</span>                       <span class="nv">sunit</span><span class="o">=</span><span class="m">0</span>      <span class="nv">swidth</span><span class="o">=</span><span class="m">0</span> blks
<a id="__codelineno-0-59" name="__codelineno-0-59"></a><a href="#__codelineno-0-59"><span class="linenos" data-linenos="59 "></span></a><span class="nv">naming</span>   <span class="o">=</span>version <span class="m">2</span>              <span class="nv">bsize</span><span class="o">=</span><span class="m">4096</span>   ascii-ci<span class="o">=</span><span class="m">0</span>, <span class="nv">ftype</span><span class="o">=</span><span class="m">1</span>
<a id="__codelineno-0-60" name="__codelineno-0-60"></a><a href="#__codelineno-0-60"><span class="linenos" data-linenos="60 "></span></a><span class="nv">log</span>      <span class="o">=</span>internal log           <span class="nv">bsize</span><span class="o">=</span><span class="m">4096</span>   <span class="nv">blocks</span><span class="o">=</span><span class="m">2560</span>, <span class="nv">version</span><span class="o">=</span><span class="nv">2</span>
<a id="__codelineno-0-61" name="__codelineno-0-61"></a><a href="#__codelineno-0-61"><span class="linenos" data-linenos="61 "></span></a>         <span class="o">=</span>                       <span class="nv">sectsz</span><span class="o">=</span><span class="m">512</span>   <span class="nv">sunit</span><span class="o">=</span><span class="m">0</span> blks, lazy-count<span class="o">=</span><span class="m">1</span>
<a id="__codelineno-0-62" name="__codelineno-0-62"></a><a href="#__codelineno-0-62"><span class="linenos" data-linenos="62 "></span></a><span class="nv">realtime</span> <span class="o">=</span>none                   <span class="nv">extsz</span><span class="o">=</span><span class="m">4096</span>   <span class="nv">blocks</span><span class="o">=</span><span class="m">0</span>, <span class="nv">rtextents</span><span class="o">=</span><span class="m">0</span>
<a id="__codelineno-0-63" name="__codelineno-0-63"></a><a href="#__codelineno-0-63"><span class="linenos" data-linenos="63 "></span></a>data blocks changed from <span class="m">15728379</span> to <span class="m">20971259</span>
<a id="__codelineno-0-64" name="__codelineno-0-64"></a><a href="#__codelineno-0-64"><span class="linenos" data-linenos="64 "></span></a>
<a id="__codelineno-0-65" name="__codelineno-0-65"></a><a href="#__codelineno-0-65"><span class="linenos" data-linenos="65 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1">#</span>
<a id="__codelineno-0-66" name="__codelineno-0-66"></a><a href="#__codelineno-0-66"><span class="linenos" data-linenos="66 "></span></a><span class="o">[</span>root@cn-south1-web-1 ~<span class="o">]</span><span class="c1">#</span>
</code></pre></div>
<p><a href="https://my.oschina.net/u/4113630/blog/4377160">参考 1: CentOS7下使用 growpart 进行磁盘热扩容</a></p>

              
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